Weather you want protection from the sun or just a little more pease-of-mind the pre-assembled, ready to install LightWise Windows make it easy to add style and function to your home. For unsurpassed privacy, beauty, and strength, nothing compares to Pittsburgh Corning Glass Block windows. And when you want real glass block with less installation hassle, nothing compares to LightWise Windows. Because they are made from real glass block, LightWise Windows will not burn or discolor, and provide a combination of features you will not find in any other glass or acrylic block windows.